Power-pump working head



A. RANDOLPH POWER PUMP WORKING HEAD il d A a 4. 1925 s Sheets-Sheet 1 Aug. 28, 1928. V 1,682,537

fig. 1

gwuenl oo Aug. 28, 1928. I 1,682,537

A. RANDOLPH POWER PUMP WORKING HEAD Filed Aug, 24, 1925 3 Sheets-Sheet 2 Aug. 28, 1928.

A. RANDOLPH POWER PUMP WORKING HEAD s Sheets-Sheet 3 Filgd Aug. 24. 1925 M K M GU70: new

Patented Aug. as, 1928.

UNITED STATES PATENT OFFICE.

mm RANDOLPH, 01' SALEM, OHIO, ASSIGNOB 1'0 rm DIIDIG comm, SALE 0310, A. CORPORATION 01 OHIO.

PO'WIR-PUHP WORKING BRAD,-

This invention is concerned with p s, and more particularly, with power heads or deep well pumps, and the general ob ect of the present invention is to provide a coinpact self-lubricating power head, liavin the operating mechanism thereof arrang in a co act manner to embody a pitman which wil have a substantially direct thrust upon the amp rod, whereby the reacting forces of t e crank motion and undesirable overhangin of the connections between the power hea and the pump rod may be reduced to a practical minimum.

A further object of the present invention is the provision of an encased power-head which may have the operative parts thereof arranged in such a manner as to afford simplicity in the production operations of manufacturing the power head and which manufactured structure will have the characteristics of durability and dependability under unfavorable operatin conditions. A. still further object of. my invention is the provision of a novel casing structure which may serve as a frame for a power head mechanism' and a lubricant retaining casing which may function in the distribution of the lubricant to the operating parts of the power head.

Other objects of my invention will be hereinafter set .forth in the followingajdm scription referrin to the accompan ing drawin which il ustrate a preferred orm thereo. The essential characteristics are summarized in the claims.

In the drawings, Fig. 1 is a side elevation of a pump and power head therefor; Fig. 2 is a cross-sectional elevation taken through the power head and an interconnectin mechanism between the power head an pump pro er; Fig. 3 is a cross-sectional elevation ta en substantially along the line 3--3 of Fig. 2; Fig. 4 is a cross-sectional detail taken along the line 44 of Fi 2 at the top of the power head casing; Fig. 5 is a similar cross-sectionaldetail taken substantially along the line 5-5 of Fig. 2; and Fig. 6 is a perspective of a cross head. 7

There are a variety of forms of power heads, particularly adaptable to the operating of deep well pumps, embodymounted directlyl ing various features which are directed to the preservation of the pump when in rural use, but these various protective features, when incorporated in the powerhead structure, usually result in greatly increasing the manufacturing cost of the power head.

My invention contemplates the provision of a powerhead, embodying a minimum number of operating parts, arranged in a novel manner, whereby these parts may be light in weight, yet extremely sturdy in constructure, and this arran ment incorporates therein as an eesentia feature thereof, a housingpr casing, com rising a frame for the operating parts and a so comprises a lubricant retainer. My arrangement of the 0 erating parts, as I will hereinafter set fort affords a maximum application of power from the pitman to the pump rod. To obtain this result, the pitman is arranged to actuate a flat slide, operating directly on the casing and the pitman moves in a path lying in a plane extending parallel to the slide and pump rod motion. The operating parts are disposed within or on the casing in such a.

manner that both a submer ed and gravity lubricating action is availalale to insure a constant lubrication of the parts.

In the drawings, I show in Fi 1, a owerhead generally designated by 1516 re erence P, mounted on a base 10 which also comrises a support for a driving motor 11.

he powerhead is connected to a pump rod 12 and suspended from the base, are rods or pipes 14, supporting an underground discharge l ead 15. The powerhead as shown in Fig. 1, is adapted to also operate a piston re 16, .carrying, in the lower end thereof, an air piston dis osed in the air cell 17, mounted in the dischar head 15. This neral arrangement is adaptable for un erground discharge to a connection afforded at on the dischar e head 15. The powerhead, as shown in i 2 is also adapted to operate a surface disc ar e deep well pump, in which case, the disc arge head 15 is atthe base of the powerhead casing as s own in Fig. 2.

The operating parts of the warhead may comprise a drive shaft 24, suitably mounted on removable oil retaining bearings and exteriorly of'the sump member.

er, suc

26, carried by the sump member 28 of the casing. The bearings are located at the upper part of the sump. member to afford roper ground clearance for a dllVlIlg memas a chain gear or pulley 30 r1 idly mounted on an extension of the she t 24 The shaft 24 carries a pinion 32 rigidl mounted therein and meshing with a cran car 33, which is rigidly mounted on a reduce bearing portion 34" of a double bearing crank member 34. As shown in Fig. 2, the two arms of the crank loosely bear on removable stud members 36 and 37 extending through suitable borings formed in the sump member 28. A pitman 40 is operated b the crank 34 and has the upper end thereo loosely connected to a pin 41', rigidly mounted on a slide member 42.

The slide member 42 may extend a substantial distance upwardly and downwardly from the pitman connection and may slide in a slideway formed on an upper casing member 44. This upper casing member may have the front wall thereof slotted from the bottom to the top thereof and a slideway 45 is formed along the margins of the slot formed in the casing. Slide plates in the form of Z-shaped rails 46 may overhang the surfaces of the slide member 42 to retain it in slidable o erative position in the slideway. The sli e member 42, it will be seen, is referably disposed substantially exterior y of the casing and the formation of the upper casing member 44 and the sump casing member 28 is such that the slide is operated vertically, with those operative surfaces thereof and of the slideway requirin lubrication disposed in planes lying within the confine of the front wall boundary of the sum%member 28. In other words, the sump mem er, in front thereof immediately beneath the slide and the slideway of the upper casing member is extended outwardly to receive all oil drainin or dripping from the slide and slideway, t us preventing oil leakage into the ump or well. This arrangement is clear y seen in Fig. 2. The slide member 42 is rovided with an extension or lug 43 to whic -the ump rod 14 may be attached in any suita 1e manner, T e connection for the air piston rod 16 may comprise an arm 48, suitably connected to the slide and iston rod 16.

From t e foregoing description, it will be seen that the casing is formed primarily by two members, one mounted u on the other and that the lower casing mem er 28 serves as a support for the crank shaft studs and drive s aft. It will be apparent that the machining operations of the arts in the course of manufacturing, may e very economically effected.

U on assembling the operating withm the casing, the pitman 40, cran arts 34 and crank gear 33, ma be first assembled as a unit and then place within the sump casing 28. The crank shaft studs 36 and 37 mag then be inserted in the crank bores.

he bearing 26 of the drive shaft may then be mounted on the casing and the drive shaft with the pinion 32 thereon may be inserted within casing bore formed to receive the bearing 25. The bearing 25 may thereafter be assembled. The upper easin member 44 may have the slide and the s ideway members assembled thereon with the exception of the final postioning of the pin 41. T e upper casing member may then be placed upon the lower casing member and the pitman connected to the slide by the proper positioning of the pin 41. The pin 41 may thereafter be retained in adjusted position by any suitable means such as a ock screw 41, threaded in the slide member 42. To facilitate inspection of the operating arts and adjustment thereof in the assemb y an opening is formed in the easing member 44 which is closed by a door 44.

It will be noted that the sump casing member 28 is preferabl formed as an integral part around all si es thereof with the exception of the top and the bores formed therein to receive the driving shaft bearings and the crank studs. By properly fitting the crank studs to prevent oil seepage, the sump member may be filled with lubricant to a level which is slightly below the drive shaft bearings. The lower end of the pitman where it is connected to the crank and the crank arm bearings and the gears are thus constantly lubricated.

To effect proper, thorough and constant lubrication of the slide member and the pitman connection thereto, I provide an oil reservoir preferably formed within the easing member 44 at the to thereof as shown at 50 see Fig. 2) to w ich oil is elevated throug an upwardl extending pipe line 52 extending throug the casing wall as shown in Fig. 4 to discharge at the middle of the oil reservoir. The pipe line 52 may be connected to an oil pump casing 53 submerged in the lubricant contained by the suinp member 28. The member 53 may be secured to an interiorly disposed lug formed on the front wall of the sump member by any suitable means such as a bolt 53. Thus, I show, in Fig. 3, a simple and convenient mechanism in association with the pump member 53 which may comprise a pump lunger 54 reci rocating in a suitable bore ormed in the oi pump member 53 and operated by an eccentric 55 preferably formed directly on the hub 34 of the crank arm. Openings are formed in the oil casing to be disposed at the end of the plunger when the same is in its uppermost position. A vacuum is formed during the upward stroke of the plunger and when the openings 70 are uncovered the oil is drawn into the Iinder. 'A spring 56 serves to operate the p unger upwardly and the eccentric operates the p un er downwardl on the force stroke. A ball 0 eck valve is s own at 57 (see Fig. 3) to check the back flow of the oil into the line 52 when the plunger is operated by the spring.

The disposition of the reservoir 50, as will be seen in Fig. 2, is such that the oil fiow therefrom, throu l1 openings formed in the front wall 0 the upper casing member will spread directly on t e slideways 45 and consequently upon the slide operating surfaces. A ca member 62 is rovided to close theto of t e reservoir an casing member 44. This cap may overhang the slideway and depending from the cap 62 may be a flat member 63 which will prevent splashing of the lubricant by the slide member 42 when it is at the uppermost reaches of its reciprocatory motion. The pitman ,40 is provided with an oil hole 40 in its upper ub where it is connected to the pin 41, which may be substantially aligned with a small opening formed in the bottom wall of the reservoir 50 whereb a constant drop ping or flow of the oil rom the reservoir will effect lubrication of the in 41 and the upper end of the pitman. rom the foreomg description of my invention, it will fie seen that provide a very compact power head adaptable to the driving of a deep well pump of either the underground or surface discharge type. All parts of the operating mechanism are either completely submerged in lubricant or constantly lubricated by a gravity flow of the lubricant from the reservoir. The operating parts are housed by an enclosing casing whlch serves to support the. operative parts as well as to retain the lubricant and exclude extraneous matter. The arrangement of the parts is such that the pitman may be connected to a vertical reciprocatory slide or cross head in balanced relation to the pump rod connection with a slight overhang between the pump rod, cross head and pitman, thus insuring maximum direct application of power from a double bearing crank to the pump rod u on the up or working stroke thereof. While the'mechanical characteristics of the operating parts is such as to assure long efficient operative life, these parts may be of comparatively light construction, thus greatly decreasing the manufacturing and merchandizin cost of the parts. The crank is provid with double bearings arms and this double bearing feature is incorporated in such a manner in the eneral arrangement of parts, as to not inter ere with the compactness thereof.

I claim:

1. In a power head of the character described, the combination of a casing, a crank within the same, said casing having an upward extension, a slideway on the exterior of said extension, a slide mounted on the slideway, a wrist pin carried by the slide and extending inwardly through a slot in the casing, a itman mounted at one end on the crank an at the other end on thewrist pin, said pitman and slide operating in parallel planes, means for connecting a' pum rod to the slide, a gear on the crank sha t within the casing, and a driving shaft parallel with the crank shaft and having a pinion meshing with the ear.

2. In a power hea of the character described, a reciprocally operable slide member adapted to be connected to a deep well pump rod, a pitman for operating the slide, a crank mechanism for operating the pitman, a casing structure enclosing said pitman and operating mechanism, said casing having a vertical slideway formed exteriorly' thereof along which the slide operates, said slideway being disposed to drain into 'the lower part of the. casin 3. In a power head of t e character described, a reciprocally operable sliding member adapted to be connected to a deep well pump rod and a itman for operating the slide, a crank mec anism for operating the pitman, a casing structure enclosing said pitman and o erating mechanism, said casing having a s ideway formed exteriorly thereof along which the slide operates an having an opening extending vertically along the slideway to afford passage for a connection between the pitman and slide.

4. In a power head of the character described, a reciprocally operable sliding member adapted to be connected to a. deep well pump rod and a itman for operating the slide, a crank mec anism for operating the pitman, a casing structure enclosing said pit-' man and operating mechanism, said casing having a slideway formed exteriorly thereof along which the slide operates and an oil reservoir formed at the top thereof for providing slideway lubrication.

5. In a power head of the character described, a crank member, means for driving the crank member, a itman, a vertically movable slide operate by the pitman, a casing comprising two members, one member comprising a support-for the crank mechanism, the other member being mounted on the first member and having its front wall set back from the wall of the first member and having a slidewa locatedabove the projecting portion of t e first member, the crank casing comprising an oil sump and the slide supporting casing comprising an oil reservoir or lubricating the slide by gravity feed.

6. In a power head of thecharacter described, a crank member, means for driving the crank member, a pitman, a vertically movable slide operated by the pitman, said slide being mounted on the exterior of the casing and having an inwardly extending wrist pin which the pitman embraces, a casing comprising an u per and a lower housing, the lower mem er comprisin a support for the crank mechanism an the u per member comprising a slideway for t e slide, said slidewa terminating at the hottom thereof behin the front wall boundary of the lower casing member and there being an opening through the to of the lower casin registering with the s ideway.

g. In a power head of the character described, a crank member, means for driving the crank member, a itman, a vertically movable slide operated y the pitman, a cas-, ing comprising an u per and a lower member, the lower mem r comprising an oil sump and a support for the crank mechanism, the upper member comprising a suport for the slide and having an oil reservoir ormed adjacent the top thereof and means for forcing the oil from the sump to the reservoir.

8. In a power head of the character described, a crank mechanism, a itman o erated thereby, a slide actuated dv the plbman, a casing supporting said sli e and enclosing said pitman and operating mechanism, said casing having an oil reservoir formed at the top thereof with s illwa s leading to the path of the slide an to t e 'pitman connection between the pitman and side, the lower part of the casing comprising an oil sump and formed to receive oil drippings from the slideway1 and slide.

9. In a power head of t e character described, a crank mechanism, a pitman operated thereby, a slide actuated by the pitman, a casing supporting (said slide and enclosing said pitman an operating mechanism, said casing having an oil reservoir formed at the to thereof with spillwa s leading to the pat of the slide and to t e pitman connection between the pitman and slide, the lower part of the casing comgrising an oil sump, an oil pump operate by the crank mechanism and an oil conduit extending from the oil pump to said reservoir.

10. In a power head of the character described, the combination of a casing, stud members secured to the casing and projecting inwardly in alignment, a double crank within the casing mounted on the stud members, a slide mounted on the exterior of the casing, a pitman in the casing mounted on the crank and swinging in a plane parallel to the plane in WhlCh the slide moves and connected with the slides b a wrist pin connection extending throng a slot in the casing, a gear within the casing additional to the crank and tight with it, and a driving pinion meshing with the gear.

1 1. In a pump-working head, the combination of an enclosed crank case ada ted to hold lubricating oil, a crank mounte inside the crank case, means of rotatin the crank, the crank case being adapted to hold oil at such level that the crank pm is immersed in the oil at each revolution, a crosshead guide housin mounted on the crank case, an oil cup in the top of the hous ng, vertical guides on the crosshead housing, a crosshead, a connection from crosshead to crank, a pump piston rod secured to the crosshead, a pump mounted ins1de the crank case and operated from the crank, an inlet to the pump below the top level of the oil, a dischar valve and valve chamber with a passage or carrying oil to the 01]. cup at the top of the crosshead guide housing.

12. In a pump working head, the combination of an enclosed crank case adapted to hold lubricating oil, a crank mounted inside the crank case, means for rotating the crank, a crosshead guide housing mounted on the crank case, an oil cup in the top of the housing, vertical crosshead guides on the housing, a crosshead, a connection from crosshead to crank, a pump piston rod secured to the crosshead, a reciprocatin pump mounted inside the crank case and operated from the crank, an inlet opening to the pump beneath the oil top level, a discharge outlet pipe from the pump to carry oil to the oil cup at the top of the ide housing with oil channels from the oi cup to the crosshead guides and the top hearing of the connecting rod.

13. In a power head, the combination of an enclosed crank case adapted to hold lubricating oil a crank mounted to rotate on bearings within the crank case, a crosshead, a crosshead guide housing, a connection from' the crosshead to the crank, a gear wheel secured to the crank to rotate with it, a gear pinion to operate the crank gear, and a pinion shaft mounted in bearin s having oil receptacles at their inner an s, a conical shape of the pinion shaft, between the end of the pinion and one of the pinion shaft bearings with small and less than the bottom diameter of the pinion teeth 5 ace, the larger and about the diameter 0 the outside of the bearing and adapted to carry oil by centrifugal force from the gears to the bearing, there being means for keeping the oil level in the crank case so that some of the ear wheel teeth are always submerged 1n the oil.

14. In a power head of the character described, a crank mechanism, a itman o erated thereby, 'a slide actuated v the pitman, a casing supportin said sli e and enclosing said pitman an operating mechanism, said casin having an oil receiver at the top with 011 channels leading to the path of the slide and to the pitman conneclevel of-the oil, a discharge valve and chamtion bearing of the slide, the lower part of her with a pipe conduit extendin up into the casing comprising an oil sump and the oil receiver at the to? of the s ide we s. means of maintaining the necessary depth In testimony whereo I hereunto a x 5 of oil, an oil pump mounted inside the case my signature.

and operated from the crank mechanism, an inlet to the pump cylinder below the top ALFRED RANDOLPH. 

